A team led by Michael Rutter found that disorders of this phenomenon were rare in Romanian-English orphans born during the Ceauşescu (“cho-SHESS-koo”) regime. Harry Harlow (-5[1])studied this phenomenon in rhesus macaques (10[2])by constructing cloth-and-wire “surrogates,” (10[1])which inspired John Bowlby’s (-5[1])theory of this (10[1])phenomenon. (10[1])In an experiment studying this phenomenon, a stranger talked to a parent before the parent left the stranger with their child. (10[1])Mary Ainsworth’s “strange situation” experiment studied this phenomenon, whose three “styles” are “secure,” “anxious-ambivalent,” and “anxious-avoidant.” For 10 points, name this feeling that an infant feels toward (10[1])a caregiver. ■END■ (10[1]0[1])